People complain about being unable to display ebooks like paper books on a shelf, but if you really wanted to do that, you could always download the cover art as JPG files and show them on a digital photo frame. There, I fixed it.
Mokalus of Borg
PS - Of course you'd want an automatic system to gather cover art so it's not a chore.
PPS - And, depending on your reading habits, you might want an approval step to make sure you show only the classiest of your library entries to guests.